import java.util.Scanner;

public class InitCalcu {

        public static void main(String[] args) {
            Calculator calculator=new Calculator();
            Scanner in=new Scanner(System.in);
            double result=0.0;
            System.out.println("请输入第一个操作数:");
            calculator.num1=in.nextDouble();
            System.out.println("请输入运算符(+、-、*、/):");
            char ch=in.next().charAt(0);
            System.out.println("请输入第一个操作数:");
            calculator.num2=in.nextDouble();
            switch (ch){
                case '+':
                    result=calculator.plus(calculator.num1,calculator.num2);
                    break;
                case '-':
                    result=calculator.minus(calculator.num1,calculator.num2);
                    break;
                case '*':
                    result=calculator.multiplyBy(calculator.num1,calculator.num2);
                    break;
                case '/':
                    result=calculator.divide(calculator.num1,calculator.num2);
                    break;
                default:
                    System.out.println("你输入的运算符不正确!");
            }
            System.out.println(calculator.num1+ch+calculator.num1+"="+result);
        }
    }
